pyqt進度條

Question

我有一個程序運行多個線程，其中一個控制界面，另一個啓動一些功能，每隔幾秒鐘。我想時機線程更新進度條買的時候我做的，我得到：

X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165 
    Extension: 150 (RENDER) 
    Minor opcode: 25 (RenderCompositeGlyphs32) 
    Resource id: 0x25 
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165 
    Extension: 150 (RENDER) 
    Minor opcode: 25 (RenderCompositeGlyphs32) 
    Resource id: 0x25 
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165 
    Extension: 150 (RENDER) 
    Minor opcode: 25 (RenderCompositeGlyphs32) 
    Resource id: 0x25 
X Error: RenderBadGlyphSet (invalid GlyphSet parameter) 165 
    Extension: 150 (RENDER) 
    Minor opcode: 25 (RenderCompositeGlyphs32) 
    Resource id: 0x25 
QPixmap: It is not safe to use pixmaps outside the GUI thread 
QPixmap: It is not safe to use pixmaps outside the GUI thread 

這裏是我的代碼：

#!/usr/bin/python 
from PyQt4 import QtCore, QtGui 
import time 

class WTrainning(wMeta.WMeta, QtGui.QWidget): 

    def __init__(self): 
     super(WTrainning, self).__init__() 

    def createUI(self): 

     ... 
     self.progressBar = QtGui.QProgressBar(self) 
     self.progressBar.setGeometry(QtCore.QRect(30, 70, 481, 23)) 
     self.progressBar.setProperty("value", 24) 
     self.progressBar.setObjectName("progressBar") 
     QtCore.QObject.connect(self.progressBar, QtCore.SIGNAL("valueChanged(int)"), self.progressBar.setValue) 
     ... 

    def modifyBarr(self, number): 
     self.progressBar.setValue(number) 

class Crono(QtCore.QThread): 

    def __init__(self, parent): 

     QtCore.QThread.__init__(self,parent) 


    def checkStatus(self): 

     for x in range(1,101): 
      self.wtobject.modifyBarr(x)       
      time.sleep(1) 

我會試着用信號（新舊版本）和爲UI更新創建專用線程，但沒有任何工作。我使用python 2.6.6和4.7.4的PyQt

Answer 1

你必須定義爲CRONO對象這樣一個信號：

class Crono(QtCore.QThread): 
    tick = QtCore.pyqtSignal(int, name="changed") #New style signal 

    def __init__(self, parent): 
     QtCore.QThread.__init__(self,parent) 

    def checkStatus(self): 
     for x in range(1,101): 
      self.tick.emit(x)      
      time.sleep(1) 

然後將其連接到進度條的插槽。

class WTrainning(wMeta.WMeta, QtGui.QWidget): 

    def __init__(self): 
     super(WTrainning, self).__init__() 
     self.crono = Crono() 

    def createUI(self): 
     #Create GUI stuff here 

     #Connect signal of self.crono to a slot of self.progressBar 
     self.crono.tick.connect(self.progressBar.setValue) 

什麼你做的是進度的信號valueChanged連接到自己的SLOT setValue